Clamping mechanism for electric grinding device and electric grinding device

Abstract

The utility model provides an electric grinding device and a clamping mechanism for the electric grinding device, the clamping mechanism comprises an outer lock sleeve, the outer lock sleeve is provided with a first end and a second end which are oppositely arranged, and the first end is provided with a matching hole matched with an electric grinding head of the electric grinding device; the inner lock sleeve enters the accommodating space of the outer lock sleeve through a matching opening formed in the second end, and the inner lock sleeve is provided with a locking channel communicated with the matching hole; when the electric grinding head is installed in the locking channel, the inner lock sleeve applies extrusion force to the electric grinding head. The technical problem to be solved by the utility model is that the locking structure of the current electric grinder chuck is a structure that the chuck is separated from a locking nut. In the actual assembly process, the nut with the internal thread is screwed with the external thread of the output shaft of the electric grinder, the chuck placed between the output shaft and the nut is pressed, and then the state of locking the electric grinder head is achieved. However, the operation steps of the assembling mode are tedious, so that the assembling difficulty is increased, and the assembling efficiency is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric grinders, and particularly relates to a clamping mechanism for an electric grinding device and an electric grinding device. Background Art

[0002] At present, the locking structure of an electric grinding chuck is a split structure of the chuck and a locking nut. During the actual assembly process, a nut with internal threads is screwed tightly with the external threads of the output shaft of the electric grinder to press the chuck placed between the output shaft and the nut, thereby realizing the state of locking the electric grinding head. However, the operation steps of this assembly method are cumbersome, resulting in an increase in the assembly difficulty and a decrease in the assembly efficiency. Summary of the Utility Model

[0003] The technical problem solved by the utility model is that the locking structure of the current electric grinding chuck is a split structure of the chuck and the locking nut. During the actual assembly process, a nut with internal threads is screwed tightly with the external threads of the output shaft of the electric grinder to press the chuck placed between the output shaft and the nut, thereby realizing the state of locking the electric grinding head. However, the operation steps of this assembly method are cumbersome, resulting in an increase in the assembly difficulty and a decrease in the assembly efficiency.

[0004] To solve the above problems, the utility model provides a clamping mechanism for an electric grinding device, including: an outer lock sleeve, the outer lock sleeve is provided with a first end and a second end arranged oppositely, and the first end is provided with a fitting hole for fitting with the electric grinding head of the electric grinding device; an inner lock sleeve, the inner lock sleeve enters the accommodation space of the outer lock sleeve through a fitting opening provided at the second end, and the inner lock sleeve is provided with a locking channel communicated with the fitting hole; wherein, when the electric grinding head is installed into the locking channel, the inner lock sleeve applies an extrusion force to the electric grinding head.

[0005] Compared with the prior art, the technical effects achieved by adopting this technical solution: Specifically, in combination with the actual operation process of assembling the electric grinding head, only the corresponding end of the electric grinding head is inserted into the lock sleeve assembly composed of the outer lock sleeve and the inner lock sleeve, and the extrusion effect on the corresponding end by the locking channel is realized, effectively replacing the screw connection in the traditional clamping method, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0006] In an example of the utility model, the inner lock sleeve includes: an elastic locking part, the elastic locking part is arranged corresponding to the position of the fitting hole, and the elastic locking part includes a plurality of elastic locking pieces circumferentially distributed around its axis; a connecting part, the connecting part is arranged at one end of the elastic locking part far away from the fitting hole; wherein, the plurality of elastic locking pieces enclose to form the locking channel.

[0007] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Briefly speaking, there is an interference fit between the electric grinding head and the lock sleeve assembly. By utilizing the elastic deformability of the inner lock sleeve, during the process of installing the electric grinding head into the locking channel through the mating hole, since the elastic locking portion is composed of multiple elastic lock pieces, under the continuous extrusion of the electric grinding head, the multiple elastic lock pieces are respectively extruded towards the corresponding inner walls of the outer lock sleeve. Compared with the case where the elastic locking portion is a closed ring structure, the situation of structural damage caused by the continuous expansion of the electric grinding head is effectively avoided, thereby improving the service life of the clamping mechanism. On the contrary, when the electric grinding head needs to be disassembled, only a pulling force for withdrawing it from the locking channel needs to be applied.

[0008] In an example of the present utility model, it includes: an elastic member, which is arranged inside the accommodating space and clamped between the outer lock sleeve and the inner lock sleeve.

[0009] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: By providing the elastic member, the tight fit between the electric grinding head and the clamping mechanism is further ensured, and the situation where the electric grinding head loosens relative to the clamping mechanism during the use of the electric grinding device is effectively avoided.

[0010] In an example of the present utility model, a limiting groove adapted to the elastic member is provided on the surface of the inner lock sleeve.

[0011] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Considering the actual use process of the electric grinding device, since the clamping mechanism is correspondingly arranged at the output end of the electric grinding device, and this part has the characteristic of relatively large vibration intensity. Through the cooperation of the limiting groove and the elastic member, the situation where the elastic member moves relative to the inner lock sleeve under the vibration is effectively avoided, thereby affecting the clamping effect of the clamping mechanism on the electric grinding head.

[0012] In an example of the present utility model, a first guiding groove is provided at a position corresponding to the mating hole at the first end; and / or, a second guiding groove is provided at one end of the inner lock sleeve close to the mating hole, and the second guiding groove communicates with the locking channel.

[0013] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: Further reducing the assembly difficulty of the electric grinding head entering the locking channel.

[0014] In an example of the present utility model, a mating groove is provided at a position of the inner lock sleeve away from the first end; the clamping mechanism further includes a connecting member arranged in the mating groove, and the connecting member is used for fixedly connecting with the motor shaft of the electric grinding device; wherein, when the motor shaft rotates, it drives the connecting member to drive the electric grinding head to rotate.

[0015] In an example of the present utility model, the connecting member has an elastic structure, and the connecting member is provided with a connection hole for cooperating with the motor shaft; wherein, the connecting member is in interference fit with the motor shaft; and / or the shape of the fitting groove is polygonal; the shape of the connecting member is adapted to the fitting groove.

[0016] On the other hand, an embodiment of the present utility model further provides a grinding device, including: a clamping mechanism provided in any of the above examples; a grinding head, which is composed of a machining part and a connecting shaft that cooperate with each other, and the connecting shaft is sleeved into the locking channel.

[0017] Compared with the prior art, the technical effects achieved by adopting this technical solution: It can achieve the corresponding technical effects in any of the above examples, which will not be elaborated here.

[0018] In an example of the present utility model, it includes: a mounting housing, and the mounting housing is provided with a mounting space for mounting the clamping mechanism; a bearing group, the bearing group is sleeved on the outer surface of the outer locking sleeve, and the bearing sleeve is clamped between the clamping mechanism and the mounting housing.

[0019] In an example of the present utility model, the connecting shaft has an external thread structure; the locking channel has an internal thread structure that is screwed with the external thread structure.

[0020] Compared with the prior art, the technical effects achieved by adopting this technical solution: It further improves the stability of installing the grinding head to the clamping mechanism.

[0021] After adopting the technical solution of the present utility model, the following technical effects can be achieved:

[0022] (1) Combining with the actual operation process of assembling the grinding head, only the corresponding end of the grinding head is inserted into the lock sleeve assembly composed of the outer lock sleeve and the inner lock sleeve, and the extrusion effect of the corresponding end by the locking channel is realized, effectively replacing the screwed connection in the traditional clamping method, thereby reducing the assembly difficulty and improving the assembly efficiency;

[0023] (2) Utilizing the characteristic that the inner lock sleeve is elastically deformable, during the process of installing the grinding head into the locking channel through the fitting hole, since the elastic locking part is composed of multiple elastic lock pieces, under the continuous extrusion of the grinding head, the multiple elastic lock pieces are respectively extruded towards the corresponding inner wall of the outer lock sleeve. Compared with the case where the elastic locking part is a closed ring structure, it effectively avoids the situation of structural damage under the continuous expansion of the grinding head, thereby improving the service life of the clamping mechanism; on the contrary, when the grinding head needs to be disassembled, only a pulling force to pull it out of the locking channel needs to be applied;

[0024] (3) Considering the actual use process of the electric grinding device, since the clamping mechanism is correspondingly arranged at the output end of the electric grinding device, this part has the characteristic of relatively large vibration intensity. Through the cooperation of the limiting groove and the elastic member, it is effectively avoided that the elastic member moves relative to the inner locking sleeve under the vibration, thus affecting the clamping effect of the clamping mechanism on the electric grinding head. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings;

[0026] Figure 1 FIG. [X] is a schematic structural view of a clamping mechanism of an electric grinding device provided by an embodiment of the present invention;

[0027] Figure 2 is Figure 1 an exploded view in [X];

[0028] Figure 3 FIG. [X] is a schematic partial structural view of an electric grinding device provided by an embodiment of the present invention;

[0029] Figure 4 is Figure 3 a cross-sectional view taken along the A-A direction in [X];

[0030] Figure 5 is Figure 3 an exploded view from another perspective in [X].

[0031] Explanation of the Reference Numerals in the Drawings:

[0032] 100, clamping mechanism; 10, outer locking sleeve; 11, mating hole; 20, inner locking sleeve; 21, elastic locking portion; 211, elastic locking piece; 22, connecting portion; 23, locking channel; 24, mating groove; 30, elastic member; 40, coupling member; 41, connecting hole;

[0033] 210, electric grinding head; 201, machining portion; 202, connecting shaft; 220, bearing group; 230, motor shaft. Detailed Embodiments

[0034] In order to make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be made with reference to the drawings.

[0035] Refer to Figure 1 , which is a schematic structural view of a clamping mechanism 100 for an electric grinding device provided by an embodiment of the present invention. CombiningFigures 2 - 5 The clamping mechanism 100 includes, for example, an outer locking sleeve 10 and an inner locking sleeve 20. The outer locking sleeve 10 is provided with a relatively arranged first end and a second end. The first end is provided with a mating hole 11 that mates with the grinding head 210 of the electric grinding device. The inner locking sleeve 20 enters the accommodation space of the outer locking sleeve 10 through a mating opening provided at the second end, and the inner locking sleeve 20 is provided with a locking channel 23 that communicates with the mating hole 11. Wherein, when the grinding head 210 is installed into the locking channel 23, the inner locking sleeve 20 applies a squeezing force to the grinding head 210.

[0036] Specifically, in combination with the actual operation process of assembling the grinding head 210, only the corresponding end of the grinding head 210 is inserted into the locking sleeve assembly composed of the outer locking sleeve 10 and the inner locking sleeve 20, so as to realize the squeezing effect of the locking channel 23 on the corresponding end, effectively replacing the screw connection in the traditional clamping method, thereby reducing the assembly difficulty and improving the assembly efficiency.

[0037] Preferably, the inner locking sleeve 20 includes, for example, an elastic locking portion 21 and a connecting portion 22. The elastic locking portion 21 is arranged corresponding to the position of the mating hole 11, and the elastic locking portion 21 includes a plurality of elastic locking pieces 211 circumferentially distributed around its axis. The connecting portion 22 is arranged at one end of the elastic locking portion 21 away from the mating hole 11. Wherein, the plurality of elastic locking pieces 211 enclose to form the locking channel 23.

[0038] Furthermore, taking advantage of the elastically deformable characteristic of the inner locking sleeve 20, during the process of installing the grinding head 210 into the locking channel 23 through the mating hole 11, since the elastic locking portion 21 is composed of a plurality of elastic locking pieces 211, under the continuous squeezing action of the grinding head 210, the plurality of elastic locking pieces 211 are respectively squeezed towards the corresponding inner wall of the outer locking sleeve 10. Compared with the case where the elastic locking portion 21 is a closed annular structure, the situation of structural damage under the continuous expanding action of the grinding head 210 is effectively avoided, thereby improving the service life of the clamping mechanism 100. On the contrary, when it is necessary to disassemble the grinding head 210, only a pulling force for pulling it out of the locking channel 23 needs to be applied.

[0039] Preferably, the clamping mechanism 100 includes, for example, an elastic member 30. The elastic member 30 is internally arranged in the accommodation space and is clamped between the outer locking sleeve 10 and the inner locking sleeve 20.

[0040] Preferably, the surface of the inner locking sleeve 20 is provided with a limiting groove adapted to the elastic member 30.

[0041] Preferably, the first end is provided with a first guiding groove corresponding to the position of the mating hole 11; and / or, one end of the inner locking sleeve 20 close to the mating hole 11 is provided with a second guiding groove, and the second guiding groove communicates with the locking channel 23.

[0042] Preferably, a mating groove 24 is provided at a position of the inner locking sleeve 20 away from the first end; the clamping mechanism 100 further includes a connecting member 40 disposed in the mating groove 24, and the connecting member 40 is used for fixedly connecting with the motor shaft 230 of the electric grinding device; wherein, when the motor shaft 230 rotates, it drives the connecting member 40 to drive the electric grinding head 210 to rotate.

[0043] Preferably, the connecting member 40 has an elastic structure, and the connecting member 40 is provided with a connection hole 41 for cooperating with the motor shaft 230; wherein, the connecting member 40 is in interference fit with the motor shaft 230.

[0044] Preferably, the shape of the mating groove 24 is polygonal; the shape of the connecting member 40 is adapted to the mating groove 24.

[0045] On the other hand, an embodiment of the present invention further provides an electric grinding device. Specifically, the electric grinding device includes, for example, an electric grinding head 210 and a clamping mechanism 100 as described in any of the above examples. The electric grinding head 210 is composed of a processing part 201 and a connecting shaft 202 that cooperate with each other, and the connecting shaft 202 is sleeved into the locking channel 23.

[0046] Preferably, the electric grinding device includes, for example, a mounting housing and a bearing group 220. The mounting housing is provided with a mounting space for mounting the clamping mechanism 100; the bearing group 220 is sleeved on the outer surface of the outer locking sleeve 10, and the bearing sleeve is clamped between the clamping mechanism 100 and the mounting housing.

[0047] Preferably, the connecting shaft 202 has an external thread structure; the locking channel 23 has an internal thread structure that is screwed with the external thread structure.

[0048] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A clamping mechanism for an electric grinding device, characterized in that: include: An outer locking sleeve (10), the outer locking sleeve (10) being provided with a first end and a second end arranged opposite to each other, the first end being provided with a matching hole (11) matching with the electric grinding head (210) of the electric grinding device; An inner locking sleeve (20), the inner locking sleeve (20) entering the accommodating space of the outer locking sleeve (10) through a matching opening provided at the second end, and the inner locking sleeve (20) is provided with a locking channel (23) communicating with the matching hole (11); Wherein, when the electric grinding head (210) is installed in the locking channel (23), the inner locking sleeve (20) applies a squeezing force to the electric grinding head (210).

2. The clamping mechanism according to claim 1, characterized in that: The inner locking sleeve (20) comprises: An elastic locking portion (21), the elastic locking portion (21) being arranged at a position corresponding to the matching hole (11), and the elastic locking portion (21) comprising a plurality of elastic locking pieces (211) distributed circumferentially around its axis; A connecting portion (22), the connecting portion (22) being arranged at an end of the elastic locking portion (21) away from the matching hole (11); Wherein, the plurality of elastic locking sheets (211) are arranged to surround and form the locking channel (23).

3. The clamping mechanism according to claim 1, characterized in that: include: An elastic member (30), wherein the elastic member (30) is disposed in the accommodating space and is sandwiched between the outer locking sleeve (10) and the inner locking sleeve (20).

4. The clamping mechanism according to claim 3, characterized in that: The surface of the inner locking sleeve (20) is provided with a limiting groove adapted to the elastic member (30).

5. The clamping mechanism according to any one of claims 1 to 4, characterized in that: A first guide groove is provided at a position of the first end corresponding to the matching hole (11); And / or, a second guide groove is provided at one end of the inner locking sleeve (20) close to the matching hole (11), and the second guide groove is connected to the locking channel (23).

6. The clamping mechanism according to claim 1, characterized in that: The inner locking sleeve (20) is provided with a matching groove (24) at a position away from the first end; The clamping mechanism further comprises a connecting piece (40) arranged in the matching groove (24), and the connecting piece (40) is used for being fixedly connected to the motor shaft (230) of the electric grinding device; When the motor shaft (230) rotates, the connecting member (40) is driven to drive the electric grinding head (210) to rotate.

7. The clamping mechanism according to claim 6, characterized in that: The connecting piece (40) has an elastic structure, and the connecting piece (40) is provided with a connecting hole (41) for matching with the motor shaft (230); wherein the connecting piece (40) and the motor shaft (230) are interference-fitted; and / or The matching groove (24) is in the shape of a polygon; and the shape of the connecting piece (40) is adapted to the matching groove (24).

8. An electric grinding device, characterized in that: include: The clamping mechanism according to any one of claims 1 to 7; The electric grinding head (210) is composed of a processing portion (201) and a connecting shaft (202) that cooperate with each other, and the connecting shaft (202) is sleeved into the locking channel (23).

9. The electric grinding device according to claim 8, characterized in that: include: An installation shell, wherein the installation shell is provided with an installation space for installing the clamping mechanism; A bearing group (220), the bearing group (220) is sleeved on the outer surface of the outer locking sleeve (10), and the bearing sleeve is clamped between the clamping mechanism and the mounting shell.

10. The electric grinding device according to claim 8, characterized in that: The connecting shaft (202) has an external thread structure; The locking channel (23) has an internal thread structure that is threadedly connected to the external thread structure.

Images